Lock



FIG. 1 is a front perspective view of a lock showing my new design;

FIG. 2 is a top view plan thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a right elevational view thereof; and,

FIG. 7 is a left side elevational view thereof.

The broken lines indicating the disclaimed portions are for illustrativepurpose only and from no part of the claimed design.

I claim the ornamental design for a lock, as shown and described.